<template>
    <div style="padding: 10px">
        <!--    功能区域-->
        <div style="margin: 10px 0">
            <el-button type="primary" @click="add" v-if="user.role === 1">新增</el-button>
            <!--<el-button type="primary">导入</el-button>
            <el-button type="primary">导出</el-button>-->
        </div>

        <!--    搜索区域-->
        <div style="margin: 10px 0">
            <el-input v-model="search" placeholder="请输入关键字" style="width: 20%" clearable></el-input>
            <el-button type="primary" style="margin-left: 5px" @click="load">查询</el-button>
        </div>
        <el-table :data="tableData" stripe border style="width: 100%">
            <!--strip：加斑马纹
            sortable：加上排序-->
            <el-table-column prop="id" label="ID" sortable />
            <el-table-column prop="name" label="名称" />
            <el-table-column prop="price" label="单价" />
            <el-table-column prop="author" label="作者" />
            <el-table-column prop="createTime" label="出版时间" />
            <el-table-column label="封面">
                <template #default="scope">
                    <el-image
                            style="width: 100px; height: 100px"
                            :src="scope.row.cover"
                            :preview-src-list="[scope.row.cover]"
                            :initial-index="4"
                            fit="cover"
                    />
                </template>
            </el-table-column>
            <el-table-column fixed="right" label="操作">
                <template #default="scope">
                    <el-button @click="handleEdit(scope.row)" v-if="user.role === 1">编辑</el-button>
                    <el-popconfirm title="确认删除吗？" @confirm="handleDelete(scope.row.id)">
                        <template #reference>
                            <el-button type="danger" v-if="user.role === 1">删除</el-button>
                        </template>
                    </el-popconfirm>
                </template>
            </el-table-column>
        </el-table>

        <div style="margin: 10px 0">
            <el-pagination
                    v-model:currentPage="currentPage"
                    v-model:page-size="pageSize"
                    :page-sizes="[5,10,20]"
                    :small="small"
                    :disabled="disabled"
                    :background="background"
                    layout="total, sizes, prev, pager, next, jumper"
                    :total="total"
                    @size-change="handleSizeChange"
                    @current-change="handleCurrentChange"/>

            <el-dialog v-model="dialogVisible" title="新增书籍" width="30%">
                <el-form :model="form" label-width="120px" style="width: 80%">
                    <el-form-item label="名称">
                        <el-input v-model="form.name" />
                    </el-form-item>
                    <el-form-item label="价格">
                        <el-input v-model="form.price" />
                    </el-form-item>
                    <el-form-item label="作者">
                        <el-input v-model="form.author" />
                    </el-form-item>
                    <el-form-item label="出版时间">
                        <el-date-picker v-model="form.createTime" value-format="YYYY-MM-DD" type="date" style="width: 80%" clearable></el-date-picker>
                    </el-form-item>
                    <el-form-item label="封面">
                        <el-upload ref="upload" action="http://localhost:9090/files/upload" :on-success="filesUploadSuccess">
                            <el-button type="primary">点击上传</el-button>
                        </el-upload>
                    </el-form-item>
                </el-form>
                <template #footer>
              <span class="dialog-footer">
                <el-button @click="dialogVisible = false">取消</el-button>
                <el-button type="primary" @click="save">确定</el-button>
              </span>
                </template>
            </el-dialog>
        </div>
    </div>
</template>

<script>

    import request from "../utils/request";

    export default {
        name: 'Book',
        components: {

        },
        data() {
            return {
                user: {},
                form:{},
                dialogVisible: false,
                search: '',
                currentPage: 1,
                pageSize: 10,
                total: 0,
                tableData:[],
            }
        },
        created() {
            let userStr2 = sessionStorage.getItem("user"||"{}")
            console.log("userStr2:"+userStr2)
            if (userStr2 === null || userStr2 === ''){
                console.log("无用户登录不进行查询")
                this.$router.push("/login")
            } else {
                console.log("查询时有用户")
                let userStr = sessionStorage.getItem("user") || "{}"
                this.user = JSON.parse(userStr)
                //请求服务端，确认当前登录用户的合法信息
                request.get("/user/" + this.user.id).then(res => {
                    if (res.code === '0'){
                        this.user = res.data
                    }
                })
                this.load()
            }
        },
        methods: {
            load() {
                request.get("/book",{
                    params: {
                        pageNum: this.currentPage,
                        pageSize: this.pageSize,
                        search: this.search
                    }
                }).then(res => {
                    console.log(res)
                    this.tableData = res.data.records
                    this.total = res.data.total
                })
            },
            add() {
                this.dialogVisible = true
                this.form = {}
                if(this.$refs['upload']){
                    this.$refs['upload'].clearFiles()  //清除历史文件列表
                }
            },
            save() {
                if (this.form.id) {
                    //如果有id，更新
                    request.put("/book", this.form).then(res => {
                        console.log(res)
                        if (res.code === '0'){
                            this.$message({
                                type: "success",
                                message: "修改成功"
                            })
                        } else {
                            this.$message({
                                type: "error",
                                message: res.msg
                            })
                        }
                        this.load() //刷新
                        this.dialogVisible = false //关闭弹窗
                    })
                } else {
                    //新增
                    request.post("/book", this.form).then(res => {
                        console.log(res)
                        if (res.code === '0'){
                            this.$message({
                                type: "success",
                                message: "新增成功"
                            })
                        } else {
                            this.$message({
                                type: "error",
                                message: res.msg
                            })
                        }
                        this.load() //刷新
                        this.dialogVisible = false //关闭弹窗
                    })
                }
            },

            handleEdit(row) {
                this.form = JSON.parse(JSON.stringify(row))
                this.dialogVisible = true
                this.$nextTick(() => {
                    if(this.$refs['upload']){
                        this.$refs['upload'].clearFiles()  //清除历史文件列表
                    }
                })
            },
            handleDelete(id) {
                console.log(id)
                request.delete("/book/" + id).then(res => {
                    if (res.code === '0'){
                        this.$message({
                            type: "success",
                            message: "删除成功"
                        })
                    } else {
                        this.$message({
                            type: "error",
                            message: res.msg
                        })
                    }
                    this.load() //刷新,删除之后重新加载表格的数据
                })
            },
            handleSizeChange(pageSize){   //改变当前每页的个数时触发、
                this.pageSize = pageSize
                this.load()
            },
            handleCurrentChange(pageNum){  //改变当前页码时触发
                this.pageNum = pageNum
                this.load()
            },
            filesUploadSuccess(res) {
                console.log(res)
                this.form.cover = res.data
            },
        }
    }
</script>
